ChemInform Abstract: KRISTALLSTRUKTUR DER VERBINDUNGEN RBBIS2 UND RBBISE2

Voroshilov, Yu. V.; Peresh, E. Yu.; Golovei, M. I.

doi:10.1002/chin.197228015

Cited by 7 publications

(25 citation statements)

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“…8 In contrast, the octahedral coordination environments in Bi(1), Bi(2), Bi(5), and Bi-(6) are highly distorted with a short bond that is trans to a long bond ( Figure 6). 11 The sites of Bi(6) and Bi (7) are partially occupied at 81% and 53%, respectively. For example, the Bi(2)-S(9) bond distance of 2.57(2) Å is trans to a long Bi(2)-S(1) distance of 3.28(2) Å.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi_6.33S₁₀ and K₂Bi₈S₁₃

et al. 1996

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KBi 6.33 S 10 and K 2 Bi 8 S 13 were synthesized by the direct combination of K 2 S/Bi 2 S 3 at high temperature (>700°C). The reaction of K 2 S/3.3Bi 2 S 3 at 800°C revealed the presence of a new ternary sulfide KBi 6.33 S 10 (I, 92% yield). The shiny, silver polycrystalline material crystallizes in the orthorhombic space group Pnma (No. 62) with a ) 24.05(1) Å, b ) 4.100-(2) Å, c ) 19.44(1) Å, V ) 1917(3) Å 3 , Z ) 4, and d c ) 5.828 g/cm 3 . Data with F o 2 > 3σ(F o 2 ), 862; no. of variables 108, 2θ max 50°. The final R/R w ) 4.3/4.7%. The structure consists of blocks of Bi 2 Te 3 -and CdI 2 -type units that are connected to form a three-dimensional network with K + ions located in the channels that run along the b axis. The same reaction but with a different reactant ratio at 750°C gave the new ternary sulfide K 2 Bi 8 S 13 (II, 94% yield). This compound crystallizes in the monoclinic space group P2 1 /m (No. 11) with a ) 16.818(2) Å, b ) 4.074(5) Å, c ) 17.801(3) Å, ) 90.48(1)°, V ) 1220(2) Å 3 , Z ) 2, and d c ) 5.900 g/cm 3 . Data with F o 2 > 3σ(F o 2 ), 1924; no. of variables 131, 2θ max 50°. The final R/R w ) 7.3/8.2%. The structure of the shiny rodlike crystals is closely related to that of I. As in I, it also consists of Bi 2 Te 3 -and CdI 2 -type fragments that connect to form K + -filled channels. The two potassium atoms and one bismuth atom are disordered over three sites. Electrical conductivity on I show semiconducting behavior with 10 2 S/cm at 300 K. Compound II possesses an electrical conductivity of 10 2 S/cm at 300 K. The optical bandgaps of I and II (0.06-0.24 eV) were estimated by infrared diffuse reflectance measurements. Thermal analysis and thermal conductivity data for I and II are reported. The thermal conductivity of KBi 6.33 S 10 is found to be substantially lower than that of Bi 2 Te 3 . a The estimated standard deviations in the mean bond lengths and the mean bond angles are calculated by the equations σl ) {∑n(lnl) 2 /n(n -1)} 1/2 , where ln is the length (or angle) of the nth bond, l the mean length (or angle), and n the number of bonds.

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Section: Resultsmentioning

confidence: 99%

“…After least-squares refinement, the isotropic temperature factor for Bi (7) was very high at 12.18 Å 2 with R/Rw ) 7.4/9.9. Both compounds were examined by X-ray powder diffraction for the purpose of phase purity and identification.…”

Section: Physical Measurementsmentioning

confidence: 99%

Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi_6.33S₁₀ and K₂Bi₈S₁₃

et al. 1996

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“…The coordination number of alkali metal cations, in all known A–Bi–Q ternary phases, varies from 5 to 9. [9a], , , The interatomic distances in K 9 Bi 13 S 24 ( 1 ) and Rb 9 Bi 13 S 24 ( 2 ) are tabulated in Table S3 and S6 (SI), and all are comparable to those reported in other ternary thiobismuthates. [9a], There are no direct S ··· S contacts found in K 9 Bi 13 S 24 ( 1 ).…”

Section: Resultsmentioning

confidence: 52%

“…Depending on the composition, the bismuth atom can show coordination numbers up to 9 and occupy mixed sites with atoms having similar size. A large number of compounds were discovered in A–Bi–Q ternary systems, which can be classified into 15 structure types: KBi 3 S 5 , RbBi 3 S 5 , CsBi 3 S 5 , RbBi 3 Se 5 , K 2 Bi 8 S 13 and KBi 6.33 S 10 ,[9a] K 2 Bi 8 Se 13 , Rb 2 Bi 8 Se 13 and CsBi 3.67 Se 6 , RbBiS 2 , K 2.5 Bi 8.5 Se 14 , Cs 3 Bi 7 Se 12 , CsBi 4 Te 6 , CsSbS 2 ‐type CsBiS 2 , Na 3 AsS 3 ‐type Cs 3 BiS 3 . The structural chemistry of A x Bi y Q z compounds is characterized by the formation of NaCl‐type, CdI 2 ‐type and Bi 2 Te 3 ‐type building block units via edge‐sharing of BiS 6 ‐octahedra .…”

Section: Introductionmentioning

confidence: 99%

“…The structural chemistry of A x Bi y Q z compounds is characterized by the formation of NaCl‐type, CdI 2 ‐type and Bi 2 Te 3 ‐type building block units via edge‐sharing of BiS 6 ‐octahedra . Interconnection of these building blocks results in the formation of layered structures, e.g., Cs 3 Bi 7 Se 12 , CsBi 4 Te 6 and RbBiS 2, and 3D polyanionic frameworks, e.g. A 2 Bi 8 Q 13 (A = K, Rb; Q = S, Se), KBi 6.33 S 10 ,[9a] and ABi 3 Q 5 (A = K, Rb, Cs; Q = S, Se), hosting the cations inside the voids.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of the Ternary Thiobismuthates A₉Bi₁₃S₂₄(A = K, Rb)

Davaasuren

Alahmari

Dashjav

et al. 2016

Z. Anorg. Allg. Chem.

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Ternary alkali metal thiobismuthates A 9 Bi 13 S 24 (A = K, Rb) were synthesized by direct combination reactions at 650°C. The compounds crystallize in the monoclinic space group C2/m (no. 12) with cell parameters a = 30.919(1) Å, b = 4.1008(2) Å, c = 20.9072(9) Å, β = 105.826(3)°for K 9 Bi 13 S 24 (1) and a = 31.823(6) Å, b = 4.1177(8) Å, c = 21.086(4) Å, β = 105.62(3)°for Rb 9 Bi 13 S 24 (2). The crystal structure of 1 contains a 3D [K 2 Bi 13 S 24 ] 7polyanionic frame-

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High Thermopower and Low Thermal Conductivity in Semiconducting Ternary K−Bi−Se Compounds. Synthesis and Properties of β-K₂Bi₈Se₁₃ and K_2.5Bi_8.5Se₁₄ and Their Sb Analogues

et al. 1997

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were synthesized by a molten flux method. The black needles of compound I were formed at 600°C and crystallized in the monoclinic P2 1 /m space group (No. 11) with a ) 17.492(3) Å, b ) 4.205(1) Å, c ) 18.461(4) Å, ) 90.49(2)°. The final R/R w ) 6.7/5.7%. Compound II is isostructural to I. Both I and II are isostructural with K 2 Bi 8 S 13 which is composed of NaCl-, Bi 2 Te 3 -, and CdI 2 -type units connecting to form K + -filled channels. The thin black needles of III and IV obtained at 530°C crystallize in the same space group P2 1 /m with a ) 17.534 (4) Å, b ) 4.206(1) Å, c ) 21.387(5) Å, ) 109.65(2)°and a ) 17.265(3) Å, b ) 4.0801(9) Å, c ) 21.280(3) Å, ) 109.31 (1)°, respectively. The final R/R w ) 6.3/8.3% and 5.1/3.6%. Compounds III and IV are isostructural and potassium and bismuth/antimony atoms are disordered over two crystallographic sites. The structure type is very closely related to that of I. Electrical conductivity and thermopower measurements show semiconductor behavior with ∼250 S/cm and ∼-200 µV/K for a single crystal of I and ∼150 S/cm and ∼-100 µV/K for a polycrystalline ingot of III at room temperature. The effect of vaccum annealing on these compounds is explored. The optical bandgaps of all compounds were determined to be 0.59, 0.78, 0.56, and 0.82 eV, respectively. The thermal conductivities of melt-grown polycrystalline ingots of I and III are reported.

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ChemInform Abstract: KRISTALLSTRUKTUR DER VERBINDUNGEN RBBIS2 UND RBBISE2

Cited by 7 publications

References 0 publications

Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi_6.33S₁₀ and K₂Bi₈S₁₃

Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi_6.33S₁₀ and K₂Bi₈S₁₃

Synthesis and Characterization of the Ternary Thiobismuthates A₉Bi₁₃S₂₄(A = K, Rb)

High Thermopower and Low Thermal Conductivity in Semiconducting Ternary K−Bi−Se Compounds. Synthesis and Properties of β-K₂Bi₈Se₁₃ and K_2.5Bi_8.5Se₁₄ and Their Sb Analogues

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ChemInform Abstract: KRISTALLSTRUKTUR DER VERBINDUNGEN RBBIS2 UND RBBISE2

Cited by 7 publications

References 0 publications

Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi6.33S10 and K2Bi8S13

Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi6.33S10 and K2Bi8S13

Synthesis and Characterization of the Ternary Thiobismuthates A9Bi13S24(A = K, Rb)

High Thermopower and Low Thermal Conductivity in Semiconducting Ternary K−Bi−Se Compounds. Synthesis and Properties of β-K2Bi8Se13 and K2.5Bi8.5Se14 and Their Sb Analogues

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Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi_6.33S₁₀ and K₂Bi₈S₁₃

Synthesis and Thermoelectric Properties of the New Ternary Bismuth Sulfides KBi_6.33S₁₀ and K₂Bi₈S₁₃

Synthesis and Characterization of the Ternary Thiobismuthates A₉Bi₁₃S₂₄(A = K, Rb)

High Thermopower and Low Thermal Conductivity in Semiconducting Ternary K−Bi−Se Compounds. Synthesis and Properties of β-K₂Bi₈Se₁₃ and K_2.5Bi_8.5Se₁₄ and Their Sb Analogues